1861.] DR. A. GUNTHER ON CENTRAL-AMERICAN FISHES. 373 



anus, twelve between the anterior portion of the second dorsal and 

 the anal. The height of the body is one-eighth of the total length, 

 the length of the head five times anel two-thirds. The head is as 

 high as broad, its width being somewhat more than one-half of its 

 length. Eyes very close together. Snout obtuse, shorter than the 

 eye, the diameter of which is one-fourth of the length of the head. 

 Cleft of the mouth slightly oblique, with the jaws equal anteriorly, 

 and with the maxillary not extending to below the centre of the eye. 

 Head naked ; scales on the nape and behind the axil very small, be- 

 coming larger posteriorly. The second dorsal spine is the longest, 

 somewhat lower than the body underneath, but higher than the soft 

 dorsal ; caudal rather elongate and pointed, two-uiuths of the total 

 length. Pectoral shorter than the head ; the ventral terminates at a 

 great distance from the vent. Light greenish olive with a series of 

 four brown spots along the middle of the tail ; sides of the head 

 with some irregular blackish-violet blotches ; dorsal, caudal, and 

 pectoral fins dotted with black, ventral and anal immaculate. 



This species has a second series of very small teeth within the 

 maxillary front series ; these internal teeth do not appear to be 

 fully developed, but destined to replace those in function. The teeth 

 of the lower jaw form a very narrow band anteriorly, and stand in a 

 single series posteriorly. 



Blennitjs brevipinnis. 



D. j|. A. 15-16. 



The height of the body is nearly equal to the length of the head, 

 and contained four times and a half in the total. The snout is 

 obtuse, with the upper profile very oblique. Jaws without a curved 

 tooth. Orbital tentacle slender, fringed at the base. The dorsal fin 

 commences in the vertical from the operculum, is deeply notched, 

 and not continuous with the caudal. The pectoral is longer than the 

 ventral, and extends on to the vent. Greyish-brown (in spirits), 

 with a darker lateral band. 



lines. 



Total length 18 or 23 



Height of the body 4 or 5 



Clinus macrocephalus. 



D. |. A. If. C. 13. P. 13. V. 1/3. 



The height of the body is contained seven times and a half in the 

 total length, the length of the head five times. The head is de- 

 pressed, rather short, nearly as broad as long ; crown of the head 

 broad and flat ; interorbital space concave, narrower than the orbit. 

 Snout very short, obtuse, rounded ; the maxillary does not extend to 

 behind the posterior margin of the orbit ; lips thick. The teeth in 

 the jaws form a band with an outer series of stronger ones ; vomer- 

 ine teeth in a narrow band ; palatine teeth none. No orbital ten- 

 tacles ; those at the nostril and on the neck very small. Gill-openings 

 wide, the gill-membranes being united at the throat. Head naked ; 



